porting the PS3 WebKitSploit and PS3 Playground, @cakehonolulu let us know in the Shoutbox of a write-up he did recently Investigating the PS3 Browser on Github for PlayStation 3 developers.
Those interested can check out the article in it's entirety HERE, and to quote from it in part:
But how can we exploit PS3's WebKit engine then?
Well, that's a matter of time, you can look up on the Internet about old Webkit bugs and test if they work on the PS3, then you could craft an exploit from them. But what's the point of running unsigned code on the userland in the PS3 nowadays when Custom Firmwares are up on all the Scenes and Downgrading has become a very used technique in order to install a full-blown Custom Firmware on the PS3? Well, there are a lot of people that can't afford a downgrader, or they don't know how to solder, or they fear that they will kill the PS3 by doing thoose things... There are a lot of reasons to research on newer PS3 models, but the first one is: Doing it for fun as past hackers did it.
Hey! Where's my TL;DR
Well, i'll resume this as much as I can: Motivated by some fellas that were porting PS4 WebKit exploits to PS3, found out that they can't work on the PS3 because Sony has (Again) failed to provide a good WebKit base by removing functionalities that are useful (In this case, TypedArrays) in the Webkit exploiting world.